Filter device



FIG. 1 is a top perspective view of a filter device;

FIG. 2 is a bottom perspective view of a filter device;

FIG. 3 is a front view of a filter device;

FIG. 4 is a back view of a filter device;

FIG. 5 is a left view of a filter device;

FIG. 6 is a right view of a filter device;

FIG. 7 is a top view of a filter device; and,

FIG. 8 is a bottom view of a filter device.

The broken line showing of a filter device is include for the purpose of illustrating portions of the article and forms no part of the claimed design. 

CLAIM The ornamental design for a filter device, as shown and described. 